I don’t know how many times i have read the “study guide” but every time i do it, i come across something new that makes me want to read more about it that often results in more knowledge about php in general. Even if you are not planning to take the exam i can really recommend everyone to read the “study guide”.
One more thing that the “study guide” contains is a training version of the certification exam. But a problem i noticed with this was that i started to learn the questions by their designation “1.a, 2.b” and so on. To over come this i created a simple javascript questionnaire to randomize the questions and answers to make it impossible to learn the designations and force me to learn the actual answer.

Unfortunately i can only share the javascript questionnaire and not the content because of copyright permission, i mailed zend to ask them if i could share this but wasn’t allowed.

I will update this post later with the link to javascript questionnaire on github for download